How do I create a circular slide (similar to a water park slide)?
Creating a slide is a rather simple process. You can easily create a slide using two modifiers. Here is how its done.

1. Create a curve to use as your path:


add a bezier curve and modifiy it


2. Create a cross-sectional of the slide:


Use a polygon mesh instead of a curve object:


curves when convertedto polygons are messy and you will need to do some manual clean up
you have easy control over the polygon count

Make sure the cross-sectional has some depth to it, it should be a 3d mesh not a 2d outline or plane.



3. Add Array and Curve modifeirs:


Select the cross sectional mesh and add an Array and Curve modifier
Array modifier settings:


Fit Type: Fit Curve, this will fill the path out for us automatically
Merge: True, erases inside polygons



Curve modifier settings:


Object: select the curve





4. Fix the slide:


Based the curve the slide can oriented in the wrong way.


Select the curve and go into edit mode.
Select the points of the curve that are messed up.
Adjust the tilt using Ctrl+T